Salaam to you all,
In Ayat 16 of Surat Sajdah of the Holy Qur'an (32:16), Allah, Azza Wa Jallah, says:--

"THEIR SIDES FORSAKE THEIR BEDS.".. Thus Allah has legislated Qiyamul-Layl year-round and made it a sign of the Righteous. Whoever has the strength to pray the Tahajjud, he should do so in the last part of the night, otherwise one should praywitr before going to sleep.

Further to this, we may as well observe that Du'a is the most apparent and easiest form of 'Ubudiyyah [enslavement]. The Noble Messenger of Allah, Sallallahu alaihi Wasallam, said: "Du'a is Worship". It is also impermissible to abandon it. The Prophet, peace be upon him, said: "Whoever does not ask Allah, He becomes angry with him." So, we must accustom our heart and hands to Supplicate to Allah, Subhanahu Wa Ta'ala.
Many Regards.